EP 2075548 A4 20160914 - SENSOR THRESHOLD VALUE CIRCUIT
Title (en)
SENSOR THRESHOLD VALUE CIRCUIT
Title (de)
SENSORSCHWELLENWERTSCHALTUNG
Title (fr)
CIRCUIT DE VALEUR DE SEUIL D'UN CAPTEUR
Publication
Application
Priority
- JP 2008065979 W 20080904
- JP 2007255983 A 20070928
Abstract (en)
[origin: EP2075548A1] There is provided a sensor threshold circuit that makes available a hysteresis width that is not dependent on the change in a threshold point. Since a bias current I B is generated by a threshold current I T and a threshold adjusting current I CONT , the threshold point is given by a coefficient A and a coefficient K and the hysteresis width |BH| is given by the coefficient K. Accordingly, when the coefficient K is determined, the hysteresis width |BH| is not dependent on the coefficient A and keeps a constant value. In addition, since the coefficient A depends on the resistance ratio, the threshold point is variable by changing a single resistor. Further, when the coefficient K is determined, the hysteresis width |BH| is also determined to be a single value with no variations in its value, no changes according to temperature, and no changes over time.
IPC 8 full level
G01D 3/02 (2006.01); G01D 1/18 (2006.01); G01D 5/244 (2006.01); G01K 3/00 (2006.01); G01R 33/09 (2006.01)
CPC (source: EP US)
G01D 3/021 (2013.01 - EP US); G01K 3/005 (2013.01 - EP US); G01R 33/09 (2013.01 - EP US)
Citation (search report)
- [A] JP 2007132706 A 20070531 - NIKON CORP
- See references of WO 2009041241A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2075548 A1 20090701; EP 2075548 A4 20160914; CN 101548158 A 20090930; CN 101548158 B 20110727; JP 4809472 B2 20111109; JP WO2009041241 A1 20110120; US 2009315575 A1 20091224; US 8054093 B2 20111108; WO 2009041241 A1 20090402
DOCDB simple family (application)
EP 08833034 A 20080904; CN 200880001005 A 20080904; JP 2008065979 W 20080904; JP 2009508639 A 20080904; US 44688007 A 20070904